You don't have to be a CS graduate to be good at programming.

You need to have a genuine interest in what you're doing. Otherwise, you're not likely going to do (let alone enjoy doing) what it takes to be good at this.

You always need to improve your current abilities and add new ones. That can be done by coding and reading (probably in that order). Github is great for this kind of thing.

You need to be aware of advancements and changes in your profession. Sites like HN are great for this.